Is it possible to simplify this mesh? I have too many vertices
If you wish to keep the overall topology of the hood, you cannot. However if you do want less vertices, there are two ways to go about doing this. The first being to lower the subdivison surface modifier. Of course this only works if you used a sud surf modifier in the first place and haven't applied it. The second way is to delete loop cuts. To begin go into edit mode and select the loop(s) you wish to remove by pressing ALT + RightClick. Press SHIFT + ALT + RightClick to select more than one.  Once selected press x to open the remove tab, finally press G to remove the loop cut.